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battery will not stay charged

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Old Jan 16, 2008 | 10:59 PM
  #1  
rangerlaxdude's Avatar
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Joined: Aug 2007
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From: Dallas, TX
Car: 85 berlinetta
Engine: 350 carb
Transmission: 4 speed auto
battery will not stay charged

so i have a 85 camaro that i bought a little while ago i just replaced the alternator because it was dead. the battery was not able to charge because of that. now tht new one is in and the battery is still not able to charge. i took it into get it tested at pep boys and they said it was fine. im woundering what the problem could be. could it be the wiring just draining the battery or the alterntor broke again or even the battery itself? please help!!!
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Old Jan 17, 2008 | 05:43 AM
  #2  
Corky's Avatar
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Joined: Sep 2006
Posts: 233
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From: Chester County, PA
Car: 88 Firebird - SOLD!
Engine: 2.8L
Re: battery will not stay charged

First, start off with a fully charged battery. Take a voltage reading across battery terminals with engine running - If 11 - 12 volts at battery, alternator or wiring problem. If 13 - 14 volts at battery, alternator doing its job.
Again, with engine running, take voltage reading at large red ternminal at the back of the alternator. Report back findings & we'll go from there.
Corky
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Old Jan 17, 2008 | 06:06 AM
  #3  
Brandon2350's Avatar
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Joined: Feb 2003
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From: Winslow, Maine
Car: 1993 Z-71 pickup
Engine: Heavily modified 355 on TBI
Transmission: Had a 4L60e. Now a 700R4
Axle/Gears: Bone Stock
Re: battery will not stay charged

Another simple way to test the alternator is remove the positive lead from the battery while it's running. If it stalls the alt. is bad. If it stays running it's working.

It could be your starter causing the battery drain.
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Old Jan 17, 2008 | 09:58 AM
  #4  
rangerlaxdude's Avatar
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Joined: Aug 2007
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From: Dallas, TX
Car: 85 berlinetta
Engine: 350 carb
Transmission: 4 speed auto
Re: battery will not stay charged

how could i tell if it is the starter? when the battery had a charge the car would run at high rpm's but if i let it idle then it would die
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Old Jan 17, 2008 | 10:30 AM
  #5  
kerplunk318's Avatar
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From: Virginia
Re: battery will not stay charged

Im willing to bet its the wiring. Check and make sure all your wires are clean tight and insulated. Esepcially the starter cable, main ground and alternator wire. Dont make the mistake of throwing a lot of parts at it.

Louis
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